Table 1.

Statistical results of the accuracy using the data samples of the calibration-like tests of eighteen points. The number of volunteers is indicated in parenthesis; floating-point values represent angular distances in degrees.

Data Set
Volunteers	A					Volunteers	B
	Valid			All			Valid			All
	$\mathit{\mu }$	$\mathit{\sigma }$		$\mathit{\mu }$	$\mathit{\sigma }$		$\mathit{\mu }$	$\mathit{\sigma }$		$\mathit{\mu }$	$\mathit{\sigma }$
Normal (8)	0.314	0.188		0.325	0.190	Normal (9)	0.427	0.384		0.457	0.493
Lens (3)	0.565	0.611		0.621	0.753	Lens (2)	0.543	0.538		0.622	0.900
All (11)	0.383	0.376		0.406	0.447	All (11)	0.445	0.404		0.483	0.581